This post presents a bug in the Zynq UltraScale+ MPSoC diagrams at xilinx.com.
All of the diagrams on the Zynq UltraScale+ MPSoC Product Landing Page share a common problem.
Here's the Application Processing Unit excerpt from a larger block diagram at link:
Look at where they put the ARM Cortex-A53 text:
Are there 4 ARM Cortex-A53's? There are not. There is _one_ Cortex-A53 with four cores that contain one Armv8-A CPU each.
Arm documents the Cortex-A53 more accurately at the Cortex-A53 site:
So the diagram from Xilinx should look like:
Xilinx makes the same mistake with the R cores as well.
Find all the bugs image found at link.